Most yes, but not all. I don't think an auto-lock is the way to go, as you will end up killing some threads that will still have interesting discussion going on. Hopefully the proportion of interesting threads will increase with some of these new measure being put in place, and so the number of "false positives" that an automatic system would lock would increase. Better instead to just have a couple of dedicated mods for these boards who can increase spam removal, which will stop many threads reaching this point in the first place, and manually check and lock the ones which still become spamfests.
To be honest, I rarely get there something worthy. I remember recently LoyceV and Suchmoon have merited two different post which also not too interesting to me, but those were at least real discussion, not something by the sig spammers. Although I have never participated in altcoin discussion, I check some of the time when I get enough time. I am looking for investing couple of bucks in altcoins.
If we think about moderating the board with more dedicated mods, in that case, we need at least 3 mods who will be only do this tasks. I doubt 3 can cover. You know you will not find your thread after 1 minute of posting, jk.